Simultaneous acquisition of π/2 phase-stepped interferograms with a photorefractive Bi_12GeO_20 crystal: application to real-time double-pulse holography

Labrunie, L.; Pauliat, Gilles; Roosen, Gérald; Launay, Jean-Claude

doi:10.1364/ol.20.001652

Cited by 18 publications

(4 citation statements)

References 20 publications

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“…Figure 2 shows a schematic diagram of such an interferometer. In this instrument [10], two mutually coherent light waves are used, one of which ( 1 ) has a circular polarization and the other (2) has a linear polarization making an angle of 45° with the plane of the figure. A polarization mirror 3 splits each input wave into two waves of equal intensity.…”

Section: Local Algorithm For Asymmetrization Of An Interference Pattementioning

confidence: 99%

10.1007/s11449-008-2024-7

2010

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Section: Local Algorithm For Asymmetrization Of An Interference Pattementioning

confidence: 99%

10.1007/s11449-008-2024-7

2010

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“…34 These configurations provide either a sequence of phase-shifted interferograms between different states of the vibrating object or a time averaged interferogram of the vibration pattern. More recently, Labrunie et al 35,36 proposed a so-called real time holographic interferometry (RT-HI) method based on anisotropic diffraction, i.e., the incident s-polarized light is diffracted as the p-polarized light and vice versa, in a Bi 12 GeO 12 (BGO) crystal. In this scheme, a refraction index grating is recorded by an overlapping signal and reference beam pulse linearly polarized along the same direction, at a certain instant of the object vibration.…”

Section: Introductionmentioning

confidence: 99%

Imaging of transient surface acoustic waves by full-field photorefractive interferometry

Xiong

Glorieux

et al. 2015

Review of Scientific Instruments

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A stroboscopic full-field imaging technique based on photorefractive interferometry for the visualization of rapidly changing surface displacement fields by using of a standard charge-coupled device (CCD) camera is presented. The photorefractive buildup of the space charge field during and after probe laser pulses is simulated numerically. The resulting anisotropic diffraction upon the refractive index grating and the interference between the polarization-rotated diffracted reference beam and the transmitted signal beam are modeled theoretically. The method is experimentally demonstrated by full-field imaging of the propagation of photoacoustically generated surface acoustic waves with a temporal resolution of nanoseconds. The surface acoustic wave propagation in a 23 mm × 17 mm area on an aluminum plate was visualized with 520 × 696 pixels of the CCD sensor, yielding a spatial resolution of 33 μm. The short pulse duration (8 ns) of the probe laser yields the capability of imaging SAWs with frequencies up to 60 MHz.

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“…This disadvantage can be overcome by adopting a pulsed laser instead of a CW laser. Labrunie et al [20,21] used a Bi 12 GeO 20 crystal and a ruby pulsed laser while Huignard et a., [22] and Rickermann et al, [23] introduced a pulsed laser and the doubleexposure holographic interferometric technique to obtain interferograms to measure the vibration.…”

Section: Introductionmentioning

confidence: 99%

Photorefractive crystal-based holographic interferometry system for full-field wave propagation metrology

Liou

Lee

2007

Opt. Express

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Although, photorefractive materials have been discovered for many years, research using pulsed laser as the light source and photorefractive material as the recording media to record a pulsed laser hologram have been scarce despite its vast application potential. A newly proposed optical configuration which adopts a Nd:YAG pulsed laser of 532nm wavelength as the light source and uses an iron-doped lithium niobate crystal as the recording media for holographic recording of an undeformed specimen is presented. Real-time holographic interferometry was achieved by inducing repetitive impacts on the specimen through a precise piezoelectric impact hammer.With timing control better than microseconds, several interferograms created at each instance were obtained with each corresponding 9ns laser pulse. A five-step phase-shifting technology, median filter algorithm, and weighted iterative DFT phase unwrap algorithm were integrated to reconstruct the deformation information at each instance. Using a series of measured deformation data, surface wave propagation phenomenon on the specimen could be observed. Some of the potential applications for this newly developed pulsed laser holographic interferometry system are detailed.

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Simultaneous acquisition of π/2 phase-stepped interferograms with a photorefractive Bi_12GeO_20 crystal: application to real-time double-pulse holography

Abstract: We present a novel method for real-time analysis of vibrations in double-pulse laser holography. Two pi/2 phase-stepped interferograms are obtained simultaneously. An experimental demonstration gives a phase measurement with an accuracy of 4 degrees .

Cited by 18 publications

References 20 publications

10.1007/s11449-008-2024-7

10.1007/s11449-008-2024-7

Imaging of transient surface acoustic waves by full-field photorefractive interferometry

Photorefractive crystal-based holographic interferometry system for full-field wave propagation metrology

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